Abstract
Chlorophyll a and oleyl alcohol form nearly ideal two-dimensional solutions, up to chlorophyll mole fraction of at least 0.2. Chlorophyll is essentially insoluble, however, in stearyl alcohol monolayers at room temperature. Measurements of collapse pressure, area, absorption spectrum, and fluorescence spectrum of the monolayers confirm these conclusions. The fluorescence and absorption spectra of concentrated and diluted (in oleyl alcohol) chlorophyll films are compared. Measurable shifts in both absorption and emission demonstrate that chromophore—chromophore interactions are detectable in monolayers containing high chlorophyll concentrations.
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